Good to hear from you here!
I get mine from the local tractor supply easy peasy online. Last bottle was about $38 or so, maybe 50 doses if you could use it all. I had to order it online and they called when it was ready. Also don’t forget the syringes, $3 for a 6 pack. (Syringes zero to 5 ml size.)
Like Treefrog I use it for my dogs also as it is the primary ingredient for heartworm preventative at 1/10 the cost.
But remember: White feet, Don’t treat as white footed critters have a genetically caused “allergy” to ivermec’tn.
PS my doctor said the quality of what I got at tractor supply was superior to what he gets to treat humans as a MD.